Improvement in machines for uniting tinned plates by heat and pressure



Machines for U nit ing Tin ned Plates by Heat and* Pressure.

PatentedMay 12. 1374.l

Ill

W//////w////l WWW 'UNITED STATES PATENT OFFICE.

GEORGE H. PERKINS, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO 4HIMSELFAND JOSEPH LE COMTE, OF NEW YORK CITY, AND ATLANTIC REFINING COMPANY, OFPHILADELPHIA, PENNSYLVANIA.

IMPROVEMENT IN MACHINES FOR UNITINGTINNED PLATES BY HEAT AND PRESSURE.

Specification forming part of Letters Patent No. 150,887, date d May 12,1874; applic ation iilcd March 18, 1874,

CAsE M.

To all whom it may concern:

Be it known that I, GEORGE H. PERKINS, of the city of Philadelphia,Pennsylvania, have invented an Apparatus for Uniting Tinned or AmalgamPlates by Heat and Pressure, of which the following is a specification:

The object of my invention is to carry out ihe heat and pressure processofuniting tinned or amalgam plates, for which Letters Patent N o. 85,742 were granted to Joseph Le Comte, on the 12th day of January, 1869, bythe mechanism which I will now proceed to describe, reference being hadto the accompanying drawing, in which- 4 Figure 1 isa front elevation,partly in section, of a soldering-press with my improvements; Fig. 2, atransverse sectional elevation of the same; Fig. 3, a sectional plan,showing the arrangement of several presses upon a single frame; Figs. 4and 5, enlarged sectional views of the dies, Fig. 6, an enlargedperspective view of the lower die; Figs. 7 and 8, sectional views of thelower die and bed of the press; Fig. 9,1` an inverted perspective viewof the detachable upper die or soldering-iron; and Figs. 10 and 11,perspective views of the lid of a tin-can, and of a handle andhandleplate to be soldered thereto by the action of heated dies.

In the present instance a number of presses,

A A1, A2, Sac., are arranged in a row upon a single frame, B, as shownin Fig. 3, which reduces their cost, and enables one attendant tooperate several without inconvenience. Each press has a bed-plate, D, towhich the lower die E is secured, and a guided plunger or head, F, whichcarries the upper die G, thc said plunger ordie-head being raisedandlowered by a cam-lever, H, hung to the frame. of the press at a, asshown in Figs. 1 and 2. The lower die E consists of -several separate`sections, b, arranged side by side, and resting at their bases uponrubber or other springs cl, contained within a groove of the bed-plate,as shown in Fig. 7 and 8, by which means an ,exact parallelism of theupper and lower dies is obtained, as fully described in a separateapplication for a patent, which I have made simultaneously with this.The several sections ot the die are retained in their proper positions,and detached from the object to be soldered in event of adheringthereto, by a transverse rod, e, secured at its opposite ends toprojections fof the bed-plate, and extending through slots in the saidsections, in such manner as not to interfere with their free yieldingmovement. (See Figs'. 5 and 7.) The upper die or soldering-tool Gconsists of a block of metal provided with a handle, j, for conveniencein carrying it to and from the heatin g-furnace, and having oppositebeveled edges g g, adapted to a dovetailed groove, h, in the die-head,its proper position within the latter in respect to the lower die Ebeing determined by a gage or stop-pin, c', in the said groove. (SeeFigs. 4., 5, and 9.) When a small portion only of a sheetemetal platehas to be heated, in carrying ont the heat and pressure process ofsoldering, the said portion is apt to become so expanded or slackened asto distort the plate, and thus interfere materially with the formationof i a perfect soldered joint. This I have found to be especiallynoticeable in solA dering a small object, such as a handle-plate, 7.',to the center of the lid l of` a tin can, (see Figs. l() and 11,) butthe objection can be en tirely overcome by bulging the metal by means ofthe dies, so as to take up the slack simultaneously with the applicationof the heat and pressure of the said dies to effect the solder ing. Thiswill be readily understood by referring to Figs. 4 and 5, where it willbe seen that the heated upper die has a projecting face adapted to thecorrespondingly sunken or re cessed face of the lower die E, so that thetin plates must be bulged by the dies sufciently to take up the slack,at the same time that they are pressed together to effect a union, bythe melting and subsequent cooling of the tin or amalgam on theadjoining surfaces of the said plates. In carrying out this feature ofmy invention, one die may have several projections and recesses, adaptedto corresponding projections and recesses on the oppo m, shown in. Figs.1, 2, and 3, when submitted to the action of the dies. The projectingcentral portion of the handle-plate, and the part of the handlecontained therein, which are not to be soldered or pressed, are receivedwithin a depression, p, formed for their reception in the lower die, andthe latter is also cut away or recessed at one side, so that the bail orhandle may hang freely from the handleplate during the solderingoperation. (See Figs. 4, 5, and 6.)

I claim as my inventionl. A machine for soldering by heat and pressure,in which the dies are constructed I and adapted to each other,substantially as hei ein described, so as to bulge the portion of thesheet metal 'subjected to them simultaneously with the soldering .of thesame, for the purpose spcciiied.

2. The combination, substantially as .described, of the soldering-ironordie G, having beveled edges g, with the die-head F, its dovetailedgroove h, and stop i.

3. The die E, constructed substantially as described, with a groove orrecess, p, for the reception of a projecting portion of the sheet metalwhich is not to be pressed or soldered.

4:. The die E, consisting of two or more separate sections, b, restingupon rubber or other yielding and elastic material, and retained inposition by a rod, 6, secured to the bed-plate, and extending throughvslots in the said sections, all substantially as specied.

5. The sectional die E, recessed at the top and side, and otherwiseconstructed, substantiall'y as described, for the reception and revtention of the handle-plate and handle during the operation ofsoldering the same to the lid of a can.

In testimony whereof I have signed my name to this specification in thepresence of two 'subscribing witnesses.

GEORGE H. PERKINS.

Witnesses WM. A. STEEL,

HUBERT HowsoN.

